Moscow: The Russian Criminal Authority said on Saturday that Alexander Pichushkin, a serial killer who was sentenced to life in prison for killing 48 people, said he was ready to admit to 11 other murders.

Pichushkin, 50, targeted his victims, usually homeless people, alcoholics and seniors, surrounded by Bitsevsky Park, a large green place in southern Moscow. His killings lasted from 1992 to 2006.

He was nicknamed “Chessboard Killer” by the Russian media because he told detectives in his confession that he wanted a coin to be placed on every 64-square-foot board for each victim.

Pichushkin has been held in the Polar Owl prison in the remote northern part of Russia’s Arctic since his sentence.

In the statement of telegraph Messenger App On Saturday, the Russian Criminal Bureau said Pichushkin told investigators that he was preparing to murder other men and women.

Pichushkin has long suspected of his convicted murder.

He claimed to have killed 63 people at trial, but prosecutors accused him of only 48 murders and three attempted murders.

If convicted of other murders, this would put Russia’s second-generation serial killer record in the case, second only to Mikhail Popkov, the 78 murders convicted by a former policeman.